Jeff and Rounding

dp, greedy, implementation, math

Bombs

greedy, implementation, sortings

Resort

graphs

Color the Fence

data structures, dp, greedy, implementation

Mafia

binary search, math, sortings

Difference Row

constructive algorithms, implementation, sortings

Alice and Bob

games, math, number theory

Expecting Trouble

*special problem, probabilities

Read Time

binary search, greedy, two pointers

Alternating Current

data structures, greedy, implementation

Rational Resistance

math, number theory

Cupboard and Balloons

geometry

Xenia and Spies

brute force, greedy, implementation

Bubble Sort Graph

binary search, data structures, dp

Tourist Problem

combinatorics, implementation, math

Xenia and Bit Operations

data structures, trees

Xenia and Weights

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Quiz

binary search, greedy, math, matrices, number theory

Routine Problem

greedy, math, number theory

Vasily the Bear and Sequence

brute force, greedy, implementation, number theory

Vasily the Bear and Fly

math

Palindrome

constructive algorithms, dp

Banana

binary search, constructive algorithms, greedy

Eight Point Sets

sortings

Chips

greedy

Secrets

greedy

Maximum Absurdity

data structures, dp, implementation

Down the Hatch!

implementation

Shave Beaver!

data structures

Shave Beaver!

implementation

Oh Sweet Beaverette

data structures, sortings

Oh Sweet Beaverette

brute force, implementation

Road Construction

constructive algorithms, graphs

Biridian Forest

dfs and similar, shortest paths

Purification

constructive algorithms, greedy

Sheldon and Ice Pieces

greedy

IQ Test

implementation

Block Tower

constructive algorithms, dfs and similar, graphs

Magic Five

combinatorics, math

Stadium and Games

binary search, math

Square and Rectangles

implementation

Black-and-White Cube

combinatorics, constructive algorithms

Ciel and Flowers

combinatorics, math

Ciel and Duel

dp, flows, greedy

Ciel and Robot

binary search, implementation, math

Ping-Pong (Easy Version)

dfs and similar, graphs

Psychos in a Line

data structures, implementation

Malek Dance Club

combinatorics, math

Strings of Power

implementation, strings, two pointers

Perfect Pair

brute force

Good Substrings

hashing, strings

Summer Homework

brute force, data structures

EKG

dfs and similar, dp

EKG

brute force, dfs and similar

Special Task

math

Sereja and Bottles

brute force

Sereja and Contest

implementation

Ilya and Matrix

constructive algorithms, greedy, implementation, sortings

Archer

math, probabilities

The Closest Pair

constructive algorithms, implementation

Memory for Arrays

binary search, bitmasks, greedy

Ivan and Powers of Two

greedy, implementation

Continued Fractions

brute force, implementation, math

Strange Addition

brute force, constructive algorithms, implementation

Calendar

brute force, implementation

Rectangle Puzzle II

implementation, math

Lucky Permutation Triple

constructive algorithms, implementation, math

Yaroslav and Sequence

constructive algorithms

Beautiful Numbers

brute force, combinatorics

Coach

brute force, dfs and similar, graphs

Snow Footprints

greedy, implementation

Fish Weight

constructive algorithms, greedy

Parity Game

constructive algorithms

Greg and Graph

dp, graphs, shortest paths

Greg and Array

data structures, implementation

Shaass and Lights

combinatorics, number theory

Shaass and Bookshelf

dp, greedy

Weird Game

games, greedy

Copying Data

data structures

Connected Components

data structures, dfs and similar, dp, dsu

Parallel Programming

*special problem, greedy

Network Mask

*special problem, bitmasks, brute force, implementation

Command Line Arguments

*special problem, implementation, strings

Orange

*special problem, implementation

WTF?

*special problem, graph matchings, implementation, trees

QR code

*special problem, implementation

Mysterious strings

*special problem, implementation

Polo the Penguin and Matrix

brute force, dp, implementation, sortings, ternary search

Polo the Penguin and XOR operation

implementation, math

Polo the Penguin and Houses

combinatorics

Polo the Penguin and Strings

greedy

Pipeline

binary search, math

Lucky Permutation

constructive algorithms, math

Permutation Sum

bitmasks, combinatorics, dp, implementation, meet-in-the-middle

Cows and Primitive Roots

implementation, math, number theory

Cow Program

dfs and similar, dp, graphs

Cows and Sequence

constructive algorithms, data structures, implementation

XOR and OR

constructive algorithms, implementation, math

Painting Eggs

greedy, math

Nearest Fraction

brute force, implementation, two pointers